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The application and working principle of the pipe discharge pump and the installation requirements of the pipe discharge pump 0

Submersible sewage pump sewage pump and pipeline we usually say, actually is a means of submersible sewage pump is a pump and motor connected, and at the same time into the work of the pump liquid products, our common submersible sewage pump: automatic stirring submersible sewage pump JBWQ series, WQ submerged pump, JYWQ automatically. Even the sewage submersible sewage pump, QW series submersible sewage submersible sewage pump. Its performance parameters include flow rate, flow speed, matching power, rated current, etc.. Impeller forms include open, semi open and closed. Below, we will explain the use of the pipe discharge pump and the principle of operation and installation requirements of the pipe discharge pump.

Application and working principle of pipe discharge pump

Application of pipeline blowdown pump

Pipe discharge pump before the pump is opened, the pump suction port and pump room filled with liquid, that is, pump. After the start, the driving machine drives the impeller rotating speed, liquid in high speed rotating impeller driven by rotating centrifugal force, under the action of centrifugal force, the liquid flow out along the impeller, the discharged liquid in the pump chamber pressure, discharged into the pipe from the pump outlet.

At this point, the center of the impeller in a vacuum low pressure area, no gas, no liquid, and the water and the atmospheric pressure, the water pressure is high, low pressure water pump inlet, pump down into the pump chamber, and inhalation, under the action of centrifugal force discharge. Reciprocating continuous work, the water inhalation, exhaust, to achieve the purpose of suction. The submersible sewage pump has the advantages of beautiful appearance, simple structure, convenient installation and use, flexible use, and flexibility.

Sewage pump is also called sewage pump, which can be used to transport sewage containing organic substance, inorganic substance or mineral substance.

Sewage pump is single stage centrifugal pump, usually do not have the function of self suction, impeller pumping of sewage, is a work of the pump into the transport medium. The pump shaft seal adopts wear-resisting end face mechanical seal.

The use of sewage pumps: sewage pumps can be widely used in food, construction, paper making, sugar, metal (such as metal electrolysis), mining and water resources mining (such as cooling water, desalination and desalination) and other industries. According to the requirements of different types of sewage pump can be divided into municipal sewage pump and industrial sewage pump. With the municipal sewage pump is mainly used in the following: the city sewage pumping medium (such as residential area sewage, manure, wastewater (sewage) sedimentation tank cleaning water) and sludge (such as activated sludge, sludge, sludge digestion and sludge inoculation) and rain.

The digested sludge refers to the sludge obtained after anaerobic digestion of the original sludge; the inoculated sludge refers to the foreign activated sludge used under the new test conditions. However, similar to the sludge liquid, the best choice of sewage sludge pump is more appropriate.

For industrial sewage pumps, the selection of suitable materials is important because industrial effluents may be highly corrosive or abrasive. The pump casing can be provided with a replaceable pump body, a mouth ring or an abrasion resistant protective device made of high wear resistant material.

Principle and principle of pipe discharge pump

Sewage pump is a pump and motor conjoined, and at the same time submerged into the work of pump products, and general horizontal pump or vertical sewage pump compared to the sewage pump compact structure, small footprint. Easy installation and maintenance, small sewage pump can be installed freely, large sewage pumps are generally equipped with automatic coupling device, automatic installation, installation and maintenance is very convenient. Continuous running time is long. Because of the coaxial pump pump and motor, short axis, rotating parts of light weight, so bearing on the load (radial) is relatively small, life expectancy is much longer than the general pump. There is no cavitation damage and irrigation water diversion and so on. Especially after the point to the operator brought great convenience. Low vibration and noise, low temperature rise of the motor, no pollution to the environment.

Mechanical characteristics of sewage pump

A unique single leaf or double blade impeller structure is adopted, which greatly improves the passing capacity of the sewage and can effectively pass 5 times the fiber material of the caliber of the pump and solid particles with a diameter of about 50% of the pump caliber.

Mechanical seal adopts new hard corrosion resistant tungsten carbide material, and the seal is improved to double end face seal, so that it can run in oil room for a long time, and can make the pump run continuously for more than 8000 hours safely.

The utility model has the advantages of compact structure, small volume, small noise, remarkable energy saving effect, convenient overhaul, no need to build a pump house, and can work when submerged, thereby greatly reducing the project cost.

The high precision anti disturbance water leakage detecting sensor is arranged in the sealing oil chamber of the pump, and a heat sensitive element is embedded in the stator winding to protect the water pump motor absolutely.

According to the user’s needs, equipped with automatic safety control cabinet, the pump leakage, leakage, overload and overheating, such as absolute protection, improve the safety and reliability of the product.

The float switch solution based on the required changes, automatic control of pump start and stop, without special care, it is very convenient to use.

And according to user needs with double rail automatic coupling installation system, which brings great convenience to installation and maintenance, this may not enter the sewage pit. It can be used in the whole range of lift, while the motor is not overloaded.

The utility model is suitable for lifting sewage and waste water containing fibrous dirt, silt and solid particles of a certain particle size.

1) foreign import, foreign owned brands of submersible sewage pump can be used for solid particles (20 ~ φ 80mm) and a variety of long fiber impurities, sewage, wastewater pumping emissions. By pumping up the sewage and waste water temperature does not exceed 60 degrees (some well-known foreign brand products can reach 90 degrees), pH value of 5 ~ 9 (foreign famous brand products as part of 6 ~ 13), suitable for single building and building residential project.

2), AS, AV using vortex impeller, suitable for pumping sewage containing solid particles; QW (WQ), JYWQ series uses flow impeller, suitable for pumping fibrous dirt, sludge and sewage and wastewater; AS, AV, QW (WQ) series of foreign brands and ordinary type submersible sewage pump application the residence time is short, less sediment sewage and waste water drainage; JYWQ series automatic submersible sewage pump and can be used to pump impurities on the hole bottom stirring to a certain extent.

Mechanical advantages of pipe discharge pump

Submersible sewage pump is a pump and motor conjoined, and submerged at the same time pump products, compared with the general horizontal pump or vertical sewage pump, sewage pump has obvious advantages in the following aspects:

1. compact structure, small footprint. Because the sewage pump is submerged, it can be installed directly in the sewage tank, and no special pump room is needed to install the pump and pump. It can save a lot of land and infrastructure costs.

2. convenient installation and maintenance. Small sewage pump can be installed freely, large sewage pumps are generally equipped with automatic coupling device, automatic installation, installation and maintenance is very convenient.

3. continuous running time is long. Because of the coaxial pump pump and motor, short axis, rotating parts of light weight, so bearing on the load (radial) is relatively small, life expectancy is much longer than the general pump.

4., there is no cavitation damage and irrigation water diversion and so on. Especially after the point to the operator brought great convenience.

5., vibration and noise is small, the motor temperature rise is low, no pollution to the environment.

Installation requirements for pipe discharge pumps

The key of the installation technology of the pipeline blowdown pump is to determine the installation height of the pipe discharge pump, namely the suction stroke. The height is the vertical distance from the water surface to the center line of the centrifugal pump impeller, it allows suction confused on a high vacuum, high vacuum suction on the vacuum pump inlet section refers to the value of the pump product specifications or nameplate allowed, and in 1 the standard atmospheric pressure, water temperature of 20 DEG C case the determination to test. It does not consider the water flow after the suction pipe is fitted. The pump installation height should be allowed to suck up the vacuum height, after deducting the suction pipe loss head, the remaining part of the value, it has to overcome the actual terrain suction height. Pump installation height shall not exceed the calculated value, otherwise the centrifugal pump will not be able to pump water. In addition, the calculated values affect the size of the resistance water pipe head loss, therefore, should adopt the shortest piping layout, and minimize the elbow and other parts, can also be appropriately equipped with larger diameter pipe to reduce the flow tube.

It should be pointed out that the elevation and water temperature of the installation site of the discharge pipe of the riser pipe are different from the experimental conditions, such as the local water temperature above 300 meters above sea level or the water temperature being pumped more than 20 degrees centigrade, the calculation value should be corrected. That is, the atmospheric pressure at different elevations and the saturated vapor pressure above the water temperature at 20 degrees centigrade. However, when the water temperature is below 20, the saturated vapor pressure is negligible. From Li Shen pipeline sewage pump installation technology, suction pipes require stringent tightness, can not leak, Water Leakage, otherwise it will damage at the pump inlet vacuum, pump out the water, even when serious pumping Sheung shui. Therefore, it is necessary to do well the interface work of the pipeline to ensure the construction quality of the pipeline connection.

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